Portable machine for reconditioning farm implement discs while on the implement structure



April 1962 J. L. BRADSTREET 3,023,769

PORTABLE MACHINE FOR RECONDITIONING FARM IMPLEMENT DIscs WHILE ON THE IMPLEMENT STRUCTURE 3 Sheets-Sheet 1 Filed Dec. 15, 1959 INVENTOR. JOHN l BRADSTREET wwym ATTORNEY.

April 10, 1962 J. BRADSTREET 3,028,769

PORTABLE MACHINE FOR RECONDITIONING FARM IMPLEMENT DISCS WHILE ON THE IMPLEMENT STRUCTURE 3 Sheets-Sheet 2 Filed Dec. 15, 1959 INVENTOR. JOHN L. BRADSTREET ATTORNEY.

April 1962 J L. BRADSTREET 3,028,769

PORTABLE MACHINE FOR RECONDITIONING FARM IMPLEMENT DISCS WHILE ON THE IMPLEMENT STRUCTURE Filed Dec. 15, 1959 3 Sheets-Sheet 3 INVENTOR.

JOHN L. BRADSTREET ATTORNEY.

United States Patent once 3,028,769 .Patented Apr. 10, 1962 3,028,769 PORTABLE MACHINE FGR RECONDITIONHVG FARM IMPLEMENT DHSCS WHILE ON THE ]M- PLEMENT STRUCTURE John L. Bradstreet, Dighton, Kans. Filed Dec. 15, 1959, Ser. No. 859,607 1 Claim. (Cl. 76-892) This invention relates to an improvement in portable disc rolling machines that may be taken to a piece of farm machinery having ground working discs thereon and the disc rolling machine may be moved along the row of several discs and be brought into engagement with the several discs, one at a time for disc rolling purposes. This invention is an improvement over my previous Patent No. 2,888,844, issued June 2, 1959.

In farm machines of the kind mentioned it has been found that for some reason, some of the discs have been mounted olf center, or in using the machine some of the discs have worn out of round, etc., and this makes it difiicult to roll or sharpen the discs in as much as the job of rolling and sharpening the discs with my improved portable disc rolling machine is done without removing the discs from the farm machine. Therefore it is an object of my improved portable disc rolling machine to do the job or rolling and sharpening the discs and also compensate for the irregularities or off center mounting of the discs.

A further object of my invention is to provide a disc rolling machine of the kind mentioned that is simplified in construction, one that is lighter in weight, one that is simpler and faster to use as well as one that is probably more sturdy and longer lived.

These and other objects of this invention will be more fully described as this description progresses.

Now referring to the accompanying drawings in which similar numerals of reference designate the same parts throughout the several figures of the drawings; FIG. 1 is a top plan view of my improved machine.

FIG. 2 is a side view of the machine shown in FIG. 1.

FIG. 3 is a detail sectional view through the machine, the View being as seen from the line Ill-III in FIG. 2 and looking in the direction of the arrows.

FIG. 4 is a detail sectional view through the machine, the view being as seen from the line IV--IV in FIG. 2 and looking in the direction of the arrows.

FIG. 5 is a detail sectional view through another part of the machine, the view being as seen from the line VV in FIG. 2 and looking in the direction of the arrows.

FIG. 6 is still another detail sectional View through a part of the machine, the view being as seen from the line Vl-VI in FIG. 1 and looking in the direction of the arrows.

FIG. 7 is still another detail sectional view through another part of the machine, the view being as seen from the line VlIVlI in FIG. 1, and looking in the direction of the arrows.

FIG. 8 is a detail sectional view through that portion of the machine, seen from the line VIIIVIII in FIG. 5 and looking in the direction of the arrows.

FIG. 9 is a detail view of one of the raising and lowering mechanism of one of the machine platforms.

FIG. 10 is a detail, bottom plan view of the lower supporting plate of the machine, the view being as seen from the line X-X in FIG. 9 and looking in the direction of the arrows.

In the drawings the machine is shown as having a lower supporting platform plate 15, the underside of which is provided with a depending V-shaped rib-like stationing element 16 that is positioned substantially on the rear half of the plate and spans the width of the plate 15 and having the apex or point of the V terminating at, or

slightly in the rear end of the supporting plate 15. The supporting plate 15 is preferably made of a piece of channel iron having the legs 15a and 15b turned upwardly. On the front end of the web of the channel 15 is a forwardly extending lip like element 17 on which is rigidly mounted an upwardly extending lip like element 17 on which is rigidly mounted an upwardly extending stud 18 around which is revolvably mounted a collar 19 that is held in place on the stud 18 by a washer 20 that is positioned around the stud 18 and bears against the collar 19 and is retained in this position by means of a nut 21 that is threaded on the upper end of the stud 18. The collar 19 is provided with a laterally extending pin 22, one end of which is rigidly attached (welded) to the collar 19. The pin 22 slidably and revolvably passes through a bearing sleeve 23, the outer end of which projects beyond the outer end of the bearing sleeve 23 and is retained therein by means of a cotter pin 24 that passes through a hole in the outer end of the pin 22, the ends of the cotter pin being spread to retain its position in the pin 22 and to bear against the outer end of the bearing sleeve 23 as a means of retaining'the pin 22 in the bearing sleeve 23 and the bearing sleeve 23 is rigidly attached (welded) to an elongated, inverted, V-shaped guide shoe 25, each end of each leg of which has a roller 26, 26b, 26a, 26a transversely positioned therein, each of which rest on a long piece of tube material 27 which lays on the ground and spans the distance of the spaced apart plow discs that are to be sharpened.

The foregoing described structure forms the major working support for the machine and guide element for the machine as the machine is moved from one disc to another for sharpening purposes as will later be described. This supporting structure will also be retractable and disengageable from the ground for transport purposes.

The machine is provided with a second platform plate element 28 which consists of a channel element 28 having its legs 28a and 23b turned downwardly, the plate 28 being adjustably spaced above the first described supporting plate 15. The two plates 15 and 28 are provided with two pairs of similar leg elements 29, 29a, and 30 and 36a, each leg element being the same in size and dimension. The upper ends of the legs 29 and 29a are pivotally connected, one to the front and one to the rear end portion of the channel leg 28a and the lower end of the legs 29 and 29a are pivotally connected about the end portions of the upturned channel leg 150. Similarly the upper ends of the legs 30 and 30a are pivotally connected to the depending channel leg 28b and the lower ends of the legs 29 and 29a are pivotally mounted on the upturned channel leg 15a, the lower ends of the legs 30 and 30a are pivotally mounted on the upturned channel leg 15b.

Transversely positioned and revolvably mounted in the central portion of the depending channel legs 28a and 28b is a tubular or pipe element 31, the ends of which project beyond the outer faces of the channel legs 28a and 28b and on the portions of the pipe element 31, adjacent the outer faces of the channel legs 28a and 28b, the upper ends of the support legs 29a and 30a are rigidly attached (welded) to the tubular pipe element 31. This forms the aforementioned pivotal mounting of the legs 29a and 30a to the upper plate 23a and 28b.

The device is further provided with an adjustment handle element 32., one end of which is rigidly attached (welded) to the pipe 31, the other end of the handle element 32 being swingable as indicated by the dotted lines 32a to rotate the pipe 31 and simultaneously swing the legs 29a and 30a to move the upper and lower platforms 28 and 15, toward and away from each other, for purposes that will later be made obvious.

The device is provided with a pair of carrying wheels 33 and 34 that are revolvably mounted, one on each of the projecting end of the tubular or pipe element 31 and are adapted to engage the ground and carry the entire load of the machine when the two platform channel plate elements and 28 are moved toward each other by the movement of the handle element 32 as previously stated.

The channel element 28 is provided with a top element 35 which consists of a rod 35 positioned against the lower edges of the channel legs 28a and 28b and is rigidly at- 1 tached (welded) thereto and the outer ends of the stop element or rod 35 project beyond the outer faces of the channel legs 28a and 2812 so that as the supporting legs 29a and 30a swing rearwardly, just beyond the perpendicular position they will engage the stop rod ends so as to stop further movement or swinging motion of the support legs 29a and 30a.

The plate 28 is provided with a balancing mechanism which consists of a long bolt 36 having a head 36a and the bolt 36 slidably passes through the lower end portions of the supporting holes in the legs 15a and 15b.

The device is further provided with a balancing spring 37 that is positioned midway between the legs of the platform plates 15 and 28.

One end of the spring 37 is attached to the tubular pipe element 31 and the other end of the spring element is attached to the bolt 36 and there is enough tension in the spring to swing all the supporting leggs 29, 29a, 30 and 30a to their vertical position and thus support the two platform plates 15 and 28 in their furthermost spaced apart position by swinging the lever handle 32 to the dotted position 32a, the support legs 29a and 30a and 29 and 39 will swing toward each other whereupon the upper plate 28 will move downwardly until the wheels 33 and 34 engage the ground, whereupon the platform plate 15 will be lifted from engagement with the ground and the entire load of the machine will then be carried on the wheels 33 and 34 and the rollers 26, 26a; 26b and 26c. Also rigidly attached to the upper supporting plate element 28 is a pair of handle elements 38 that are mounted on one end of a supporting shaft 39, the other end of which is rigidly attached (welded) to the supporting plate 28 and the machine may be lifted by these handles 38 for adjustment purposes as will later be described.

The machine is further provided with a disc sharpening roll device and an engine for driving the roll device. The engine 40 and the general roll R mechanism drive are all carried on the support plate 28 and consists preferably of an internal combustion engine 40 having a drive shaft 41 which extends into a chain and sprocket case in which a small sprocket 43 is rigidly mounted on the end of the engine drive shaft 41.

The machine is also provided with a large chain sprocket 44 that is rigidly mounted on one end of a short jack shaft 45 which is revolvably carried in a bearing 46 that is rigid with the chain and sprocket case 42.

A sprocket wheel 44 is in the sprocket and chain case 42 and is in alignment with the small sprocket 43 and a chain 47 passes around the sprocket wheels 43 and 44 whereby the small sprocket 4-3 will drive the large sprocket 44 at a reduced speed.

On the outer end of the jack shaft 45 is a universal joint sturcture 48 in which one end of a drive shaft 49 is seated whereby the drive shaft 49 may be rotatably driven by the universal joint 48.

The machine is provided with a rockable roll carriage C which consists of a channel base element 50 having upturned channel legs 50a and 50b. The machine is also provided with a pair of link elements 51 and 51a, the upper ends of which are rigidly attached (welded) to the outer faces of the rear end portions of the channel legs 50a and 50b and the link elements 51 and 51a extend downwardly along the outer faces of the channel legs 28a and 28b of the channel plate 28 and are pivotally attached thereto at the points 52 and 53.

The rear end of the channel 50 is provided with a vertically positioned wall 54 that is rigidly attached (welded) to the channel 50 and the vertical wall 54 is provided with a second vertical wall 55 that is spaced away from the first vertical wall 54 and on the vertical wall 55 is carried a bearing 56 in which is rotatably carried a second jack shaft 57 which extends through the bearings 56 and supporting wall 55 and into the space 55 and 54. On the outer end of the second jack shaft 57 is a second universal joint structure 53 in which is seated the other end of the drive shaft 49 whereby the drive shaft 49 will rotatably drive the jack shaft 57. On the inner end of the jack shaft 57 and positioned between the two walls 54 and 55 is rigidly mounted a small sprocket 59 on the inner end of the drive shaft 57.

The roll device R is provided with a pair of bearing sleeve elements 6! and 61, each of which loosely fits in holes 62 and 63 so as to permit movements of the outer ends of the sleeves and 61 toward and away from each other. The sleeves 60 and 61 have notches 64 and 65 on opposite sides thereof in which is fitted opposite edges of a notched plate 66 to retain the sleeves 60 and 61 in place. In each end of the sleeves 60 and 61 are an anti-friction bearing 67 and in the sleeve 60 and carried by its respective bearings is a roll shaft 68, the inner end of which projects inwardly between the walls 54 and 55 and on the inner end of the shaft 68 is rigidly mounted a large sprocket wheel 69 that is in alignment with the small sprocket wheel 59. A chain 70 passes around the small sprocket wheel 59 and the large sprocket wheel 69 whereby the small sprocket wheel 59 will drive the large sprocket wheel 69 at a reduced speed.

Similarly a second roll shaft 71 is revolvably carried in the bearings 67 in the sleeve 61 and the inner end of the roll shaft 71 extends inwardly into the space between the walls 54 and 55 and the inner end of the roll shaft 71 is provided with an idler roller 72 that is rigidly mounted on the inner end of the roll shaft 71 and is in alignment with the sprocket wheels 69 and 59 so that the chain passes under the idler roller 72.

On the outer ends of each of the roll shafts 68 and 71 is rigidly mounted a roll element, parts of which are adapted to engage each other for disc rolling purposes.

On each bearing sleeve 60 and 61, adjacent the rolls 73 and 74 is a pair of downwardly projecting ear like elements 75 and a pair of upwardly projecting car like elements and between the downwardly projecting ear like elements on each sleeve 60 and 61 is positioned a link element 77 and pins 78 and 79 slidably pass through holes in the lower ends of the ear like elements 75 on each sleeve element 60 and 61 and also slide through holes, one in each end of the link element 77 to form a positive pivotal link connection between the under sides of the two sleeves 60 and 61.

The upper sides of the bearing sheeve holders are pivotally connected with an adjustable connection comprising a link having an open link 80 having an opening 80/) and having a round pin hole 9a through one end of the link adjacent the big opening of the link. The end of the link having the round hole therein is fitted between two of the upwardly projecting ear like elements 76 on one of the bearing sleeves 6G and a bolt 81 is slidably passed through holes in the ear like elements 76 and the hole 80a in the link to form a pivotal mounting for the link 80 on the eating sleeve element 60.

In the other end of the link 80 and in the opening 801) is snugly fitted a threaded nut 82 and the end portion of the link 89 has a bore 83 therethrough that is in alignment with the threaded hole in the nut 82.

The device is provided with a tension bolt 84 having a square head 84:: thereon and a thrust bearing 85 fitted therearound and the bolt 84 being slidably passed through the bore 83 and threaded into the nut 82 so that the thrust bearing 85 will bear against the pair of upwardly directed ear like elements 76 so that a wrench (indicated by the dotted lines 86) may be placed on the bolt head 84a and the bolt 84 turned to separate or draw the roll 73 and 74 together with any desired pressure.

The rockable roll carriage C is provided with a vertical rocking adjustment which comprises a strip of material 87 that is set edge ways and vertically on the wall 55 and projects outwardly therefrom and is provided with a pair of threaded nuts 88 and 88a that are positioned in alignment with each other and are positioned one at the upper and one at the lower edge of the support element 87. A threaded adjustment shaft 89 is threaded through the nuts 88 and 88a and projects downwardly to the channel plate 28 where it loosely passes through a hole 98 in the plate 28 and on the upper end of the shaft 89 is rigidly fixed a transversely positioned handle element 89a by which the shaft 89 may be turned.

Beneath the plate 28 and positioned around the lower end of the threaded shaft 89 is positioned a helical compression spring 91 that is held under compression between the plate 28 and a washer and nut 92 that is threaded on the lower end of the shaft 89, there being a cotter pin 89 passing through the shaft 89 to prevent the nut 92 from backing off the shaft 89.

The device is provided with a gauge for engaging the distance the disc may enter between the rolls. This device consists of a gauge roller 93 that is revolvably carried on an axle element 94, the ends of which are mounted in the free ends of the legs of a U-shaped element 95.

The rounded or closed end of the U-shaped element has a pair of spaced and rearwardly extending support legs 96 and 97 that are rigidly attached thereto. The rear end of the legs 96 and 97 have holes therein that are in registry with each other and a tongue element 98 is fitted therebetween and has a hole therethrough, all three of the holes being in registry with each other and having a bolt 99 slidably passed therethrough and being held in place by a nut 100 to form a pivotal mounting whereby the gauge roller 93 and the U-shaped element 95 therefore can rock in a horizontal plate. In the mid-portion of the tongue element 98 is a horizontally disposed hole 101 therethrough and fits between the legs 50a and 50b and a pin 102 is slidably passed through the legs 50a and 50b in the hole 106 whereby the roller gauge 93 can be rocked up and down in a vertical plane. On the plate 54 is a forwardly extending arm s that extends over the rear end of the tongue element 98 and has a screw 104 threaded therethrough to engage the rear end of the tongue element 98 as a means of rocking the support members for the roller gauge element 93 up and down for adjustment purposes.

The operation of the device is as follows: The tubular pipe element 27 is laid on the ground in parallelism with the center longitudinal axis of the gang of discs on the plow, whereupon the machine may be handled by tipping the machine to be supported on the two supporting wheels 33 and 34 and then rolled to position where the V-shaped guide element 25 will be positioned over the tubular pipe element 27 and then rocked forwardly until the rollers 26, 26a, 26b and 26c engage the tubular pipe element 27 in position to partially carry the load of the machine, whereupon the lever 32 may be pulled rearwardly to the position of the dotted lines 32a in FIG. 9 whereupon the lower support plate has engaged the ground and the upper support plate has raised and lifted the wheels 33 and 34 off the ground and the V-shaped rib element 16 has seated its self on or in the ground to stabilize the position of the machine. At this point the engine 40 may be started and the rolls 73 and 74 are now revolving in working position. Now by continuing the movement to the position 32a, the plate 28 and the structure thereon is moved forward and one of the discs D of the plow will enter between the rolls 73 and 74 to the point where the rolls 73 and 74 engage each other, whereupon the edge of the disc D is rolled and pinched to a sharp edge. After the entire circumference of the disc has passed between the rolls and have been sharpened, the lever 32 may be raised, whereupon the rolled device is removed from the discs D and by lifting on the handles 38 the machine may be lifted and moved sideways on the rollers 26, 26a, 26b and 260 to the next disc where the process may be repeated and so on until all of the discs of the plow have been sharpened, at which time the machine may be moved away from the plow on its supporting wheels 33 and 34 and rolled onto a suitable truck or conveyance where the machine may be put in use again as above described.

While the machine as shown and described is probably the preferred form of the machine, it is to be understood that such modifications of the machine may be employed as lie Within the scope of the appended claim without departing from the spirit and intention of the invention.

Now having fully shown and described my invention, what I claim is:

A disc sharpening machine of the kind described; said machine having an intermediate platform and a base platform, said intermediate platform having wheels carried thereby for the support thereof and a roll machine carrying platform, said roll carrying machine platform being vertically, rockably mounted on the intermediate platform and means connected between the intermediate platform and the roll machine carrying platform for adjustably rocking and stationing the roll machine carrying platform; a roll machine and a power unit for driving the machine; said roll machine having a pair of engageable and disengageable rolls thereon and speed reduction driving means carried by the roll machine carrying platform and connecting between the power unit and the roll machine for the driving of the rolls of the roll machine; a base supporting platform; said base supporting platform and the intermediate platform being linked together by pairs of parallel, rockable leg elements and means for rocking said leg elements to bring the lower base element into engagement with the ground and subsequently lift the intermediate platform and its supporting wheels from engagement with the ground; said pairs of parallel legs being tiltably positioned so that the positioning of the base and intermediate plates as aforestated will carry the intermediate platform and roll machine carried thereby forwardly to enter a stationary disc between the rolls of the roll machine, said means for adjustably rocking the roll machine plate being a threaded shaft; said shaft having means thereon for. turning the shaft; said threaded shaft threadedly engaging parts on the roll machine carrying platform and extending downwardly through an opening in the intermediate platform and spring means around the lower end portion of the threaded shaft; said spring means being under compression between the underside of the said intermediate platform and a stop element on the lower end of the threaded shaft to position a yieldable adjustment of the rockable roll machine carrying platform.

References Cited in the file of this patent UNITED STATES PATENTS 2,487,709 Hodges Nov. 8, 1949 2,729,121 Robinson Ian. 3, 1956 2,770,986 Bass Nov. 20, 1956 2,847,803 Nuttman Aug. 19, 1958 2,888,844 Bradstreet June 2, 1959 

